Howdy
It has been my experience that banks has a pretty good customer tech dept and they do a ton of research and they also track their product pretty good.
I would call them up and see what they say.
IMHO....between my 1999 and my 1996 I have had three different ECM programs. All from good names....none of them make a HUGE difference but with other real mods they were needed. If you haven't done anything else with the truck then I wouldn't get your hopes up.